Valve construction



March 21, 1933. HH HALLER 1,902,069

VALVE CONSTRUCTION- Filed July 19, 1950 Patented Mar. 21, 1933 UNITED STATES Price HARVEY H. HALLER, 0F LOSANGELES, CALIFORNIA, ASSIGNOR TO THE WEHRVMOTOR COMPANY, OF LOS ANGELES, CALIFORNIA, A CORPORATION OE CALIFORNIA VALVE CONSTRUCTION Application -11ed 'July 19,

My invention relates to valve constructions', and more particularly those :associated with internal combustion engines in which a compensation means is provided for changes in temperature and wear.

It accordingly is `an .object of my invention to provide a novel form of temperature and wear compensating means for the rotary valves of internal combustion engines -comprising a pair .of coacting shoes, one being double concave in construction, while the other is plano-convex, the plane surface of which is adapted to conform to the taper of the inner surface of the valve casing vor its cover or closure, so there `will not only be a wedging yaction toward and :away from said;i

'rotary valve, due to an adjustable spring assembly associated with one of said shoes, but also a relative arcuate movement between said sho-es, to the end that all temperature and wear changes are at all times eectiveily compensated for so that there shall be no leakage between said valve and its .seat associated with the cylinder ports ofsaid engine.

The above and further objects and advantages of my invention, as will hereinafter more fully appear, I attain by the construction described in the specification, .and illustrated in its preferred form on the drawingI forming a part of my application. f

Reference is had to the accompanying drawing, in which similar reference .characters denote similar parts. In the drawing,

Fig. 1 is a` transverse cross-sectional view through an internal :combustion engine equipped with my invention,

Fig. 2 is a longitudinal sectional view of Fig. l, on a reduced scale, taken through the vertical center line of said Fig., and

Fig. 3 is an enlarged fragmentary detail sectional view through the valve casing illustrating more particularly the cut-out portions thereof.

Describing my invention more in detail, in its broader aspects said invention comprises a rotary valve having associated therewith a pair of preferably springactuated compensa-ting devices which may take the form of a double concave shoe adapted to be seated on and in engagement with the rotary valve 1930. Serial No. 469,178.

of an internal combustion engine, with which is associated another shoe, plano-convex in form, having an` upper surface adapted to co- .act with a complementary tapered .inner surface :of the valve casing or its cover, so that there will not only be a wedging .action toward and away from said valve,'=but there will be a relative arcuate movement between V Ajassociated with the cylinders 6 in any way in practice preferred.

'The valve casing l0 has associated therewith the usual inlet port l2 and exhaust port 14, controlled bythe rotary valve 16,-hav-ing cut-out or cut away portions 18 which `are adapted selectively to connect the inlet port 12 with the cylinder port 8, and the exhaust .port 14 with .saidcylinder port 8, said valve being adapted to be rotated in the direction of the arrow, any preferred form of spark plug' .2O being used in connection with the cylinder 6.

Associated with the valve V16l in any preferred way, but preferably positioned on the top thereof as shown, is alowercompensating valve shoe 21, double concave in construction,V

which shoe is continually urged toward the valve by the adjustable bolt .and spring lassembly 22.

Associated with the lower shoe 2l, and adapted .to move .therewith and .also relative thereto, is an upper compensating shoe 24, said shoe being plano-convex in construction, the convex portion being adapted to be seated in the upper concave portion of the lower shoe 2l, while the upper plane surface of the shoe 24 is adapted to correspond with the f taper of the `inner surface of the valve casing or its cover or lclosure 26, which cover-or closure may be detachably associated with the valve casing 10 in any preferred way, .as by :the screw bolts 28.

It will be observed that 'by reason ofthe construction just described, an adjustable wedging action is had between the compensating devices 24 andv 21 and the valve 16, and moreover, that there will be an arcuate movement of the upper shoe 24, relative to vthe lower vshoe 21, thus at all times holding the valve 16 to its seat, irrespective of all variations of temperature or wear changes, thus insuring that leakage is effectively prevented about said seat.

If desired, the valve 16 may be provided with a set of packing rings 28, in case the engine is of the multi-cylinder type, to obviate any leakage between the cylinder-ports 8.

It will also be noted that the valve casing has a'cut-out portion 30, connected to a chain nel or passage 32, which in turn is connected to a piping 34, which piping may lead to a suction means of any character 4so that the cut-out portion may be subjected to vacuum conditions.

The periphery of the vcut-out portion 30, which, it will be noted, embraces a substantial portion of the periphery of the valve 16, is to provide a means for lubricating said valve, the lubricant being introduced in any preferred way, as by the pipe'36, connected with a passage 38 in the valve cover 26, which passage is in alignment with a passage 40 in the upper shoe 24, and the passage 42 in the lower shoe 21.

Suction being maintained inthe pipe 34, the lubricant enters the pipe 36,and by reason of the passages 40 and 42, as well as the movement of the shoes 24 and 21 and the rotation of the valve 16, the upper and lower surfaces of each shoe as well as the periphery of the valve 16, by reason of the cut-out portion 30, is at all times effectively lubricated, said passages and cut-out portion being subjected to vacuum conditions by reason of the suction maintained at the pipe 34, the packing rings 28 preventing any leakage between the cylinder ports 8. n

If desired, the upper shoe 24 may be provided with a set of slots 44, shown in dotted lines, whereby any inaccuracies due to faulty machining may be compensated for.

In accordance with the provisions ofthe patent statutes, I have described the principle of operation of my invention together with the apparatus which I now consider to represent the best embodiment thereof; but I desire to have it understood that the apparatus shown is only illustrative, and that the invention can be carried out by other means.

I claim as my invention:

1. In arotary valve, a compensating device comprising a movable Vspring-pressed shoe, having concaved upper and lower portions, said lower portion being adapted to engage the periphery of said valve, and a plano-convex backing member having a curved lower portion adapted to engage the' upper concaved portion of said shoe, where- -ablc ,shoe and a vbacking member having an upper plane surface, said backing member being adapted to have a sliding movement with respect to said casing and a relatively olscillating movement with respect to said sioe; 1

4. In a rotary valve, a compensating device'l comprising a movable spring-pressed shoe adapted to engage said valve, and a movable arcuate backing member having its arcuate portion associated with said shoe and 'responding in its movements to the movement of said shoe.

5. In an internalV combustion engine, a valve casing having a tapered inner surface, a rotary valve in said casing, a springpressed shoe having its lower surface in engagement with said valve, and its upper surface concaved, and a backing member having its upper surface plane to correspond to the Y taper of said valve casing, and its lower surfacecurved to correspond to the curvature of the upper surface of said shoe.

6. Ina rotary valve, a casing therefor, and a yplurality of compensating shoes associated with said valve, one of said shoes being double concave in contour while the other is plano-convexy 7. In a rotary valve, a casing therefor, and afset of spring-pressed compensating shoes associated with said valve, one of said shoes havinof an un er lane face and a lower conveX surface, and another ofy said shoes having upper and lower concave surfaces.

In testimony whereof I have signed my name to this specication.

' HARVEY I-I. HALLER. 

